Fix light effect not being turned off sometimes

[TheJulianJES]

DRAFT. Should be cleaned up further.

Proposed change

This fixes an issue where sending a light turn on command with a color temperature does not cause some lights to switch into color temperature mode if the "color loop" effect is currently active.

Previously, we only turned off the effect after sending color (temp) commands. Now, we also do it before, though only if we're certain that an effect is active, to not send unnecessary packets.

Notes

Lights continue to be one of the most complicated things to do 100% right. This is the one known issue that happens in some cases.

In general, the light class will be cleaned up soon a bit. I want to increase test coverage for all edge cases before, though.
This PR may be adjusted and merged only after that's done. We'll see.

Additional information

• Addresses: ZigBee lamp fails to switch to colortemp mode from a scene when colorloop effect active home-assistant/core#153431
• Fixes: [ZHA] Fix light effects not turning off sometimes backlog#48

[codecov]

Codecov Report

❌ Patch coverage is 85.71429% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 97.66%. Comparing base (696ab1c) to head (aeb75e5).

Files with missing lines	Patch %	Lines
zha/application/platforms/light/__init__.py	85.71%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev     #733      +/-   ##
==========================================
+ Coverage   97.63%   97.66%   +0.03%     
==========================================
  Files          62       62              
  Lines       10814    10825      +11     
==========================================
+ Hits        10558    10572      +14     
+ Misses        256      253       -3     

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